Knob



FIG. 1 is a front perspective view of a knob showing my new design;

FIG. 2 is a front view thereof;

FIG. 3 is a right view thereof;

FIG. 4 is a left side view thereof;

FIG. 5 is a top view thereof; and,

FIG. 6 is a bottom view thereof.

The contrast in shading (stippling and line shading) represents a contrast in appearance only and does not represent any particular color, material, texture, or finish. 

CLAIM The ornamental design for a knob, as shown and described. 